Large Print Sudoku: Hard

150 large-print sudoku puzzles, one to a page, with every solution included. Each grid fills a full 8.5 x 11 inch page, so the cells are big enough to write in comfortably and to pencil in candidates without squinting. Every puzzle has exactly one solution, verified. Difficulty is graded by the solving techniques a puzzle actually requires, not guessed from the number of clues, so Hard means Hard for a solver's reasons.